Hello, we are A&J Developers, We create Radios Professionally with AppyBuilder. We use AppyBuilder components and also Extensions.
We use in AppyBuilder, the simple first as Buttons, WebViewer, Notifier, etc. After Admob, OneSignal (Very Important for the User of the App, always in interactivity with it)
Extensions like Andres_Cotes: Sidebar, ActionBar, SnackBar.
Taifun: Taifun Tools, Taifun Alarm, Taifun Sharing.
And WebViewerDialog.
Our Google Play Store Link: Link Google Play Store
Here something of our work: